Port of Tallinn (AS Tallinna Sadam) is Estonia’s largest cargo and passenger port complex that fills an important function in the Estonian transport system and national economy as a whole. Considering both the number of passengers and trade flows, the Port of Tallinn that operates in the form of a state enterprise also constitutes the largest port complex on the Baltic Sea. The Port of Tallinn consists of five harbors: Old City Harbour, Muuga Harbour, Paldiski South Harbour, Paljassaare Harbour, and Saaremaa Harbour.